This Samsung 512GB SSD is designed for use in a MacBook Pro A1502 and is a reliable and efficient storage option for your computer. It supports SSD (Solid State Drive) drive type and is compatible with different models including MF839LL/A, MF840LL/A, MF841LL/A, and MZ-JPV512S/0A4. With its large storage capacity, you can keep all your important files and data safe and secure. The drive is used, is in excellent working condition, and has been pulled from a working unit.